A measuring device for the coaxiality of internal and external sleeve teeth in a box body

Abstract

The invention provides a measuring device for the coaxiality of internal and external sleeve teeth in a box body. The measuring device comprises a front core shaft and a supporting sleeve which are coaxial; three slide supporting blocks slide in the radial direction along with the axial displacement of the front core shaft; a two-dimensional tilt angle sensor is fixed to the front end of the frontcore shaft to detect the spatial angle change of the axis; a hinge joint head is fastened to a rear core shaft; the front end of the hinge joint head is fixed in a ball socket of the front core shaftand can rotate relative to the ball socket; a fixing half ring and the rear core shaft form a slide groove; the rear core shaft is restrained and realizes planar slide; a rear end cover is peripherally provided with eddy current sensors for detecting the axial movement of the rear core shaft; the rear end cover reflects the central axis of external sleeve teeth and an external contour ring formedby the slide supporting blocks reflects the central axis of internal sleeve teeth; the coaxiality of the internal and external sleeve teeth can be calculated according to the signals collected by thetwo-dimensional tilt angle sensor and the eddy current sensors. The device can effectively prevent introduced error of cantilever measurement and rapidly judge the coaxiality of the internal and external sleeve teeth, thereby being suitable for on-site use.

Description

Technical field [0001] The invention is a measuring device for the coaxiality of outer teeth in a box and belongs to the technical field of product structure. Background technique [0002] The assembly site often encounters the measurement requirements of the coaxial set of teeth in the measuring box, especially for aircraft accessory receivers and engine accessory receivers. For example, in the installation of the aircraft accessory receiver and the fuselage body, a spline shaft is required to connect the aircraft accessory receiver gear and the aircraft internal gear. The coaxiality of the shaft is an important indicator to ensure the reliability of the equipment. If the axis of the equipment is not aligned, the bearing parts will be damaged prematurely, and the friction of gear parts will be greatly increased, and the wear of rotating parts will be accelerated. The overhaul period of the aircraft is shortened, the operating cost is increased, and the equipment operation effic...

AI Technical Summary

Problems solved by technology

[0003] The traditional measurement is achieved by the ordinary shaft penetration method, but the processing of the inner sleeve teeth cannot be guaranteed, and the plug gauge method currently used on site cannot accurately judge the coaxiality of the inner and outer teeth; Southeast University has studied the laser alignment instrument To adjust the relative position of two phase-connected equipment, this device has been widely used in the installation and maintenance of electric motors and pumps, and the traditional dial gauge can be used to verify the accuracy, but due to the need to detect The two axes of the coaxiality are the clear axes

However, only the outer teeth are exposed in the coaxiality measurement of the inner sleeve teeth, and the inner sleeve teeth cannot be tested by dial indicators, nor can they be measured by laser alignment instruments; However, this arrangement is a cantilever design, which inevitably introduces deflection errors into the measurement system, and this error is difficult to calculate and compensate as the spatial angle of the measurement surface changes; if High-precision measuring machines are used. At present, the measuring arms of Hexagon and other manufacturers are thick and long. Not only is it difficult to penetrate into the casing through the outer teeth, but also the measuring device itself is heavy and requires a special measuring foundation. And special gas source, unable to adapt to the measurement environment of the assembly site

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